![]() ![]() Graph showing distribution of volcanic earthquakes and rockfalls from June 2013 to November 2013. Volcanic earthquakes (VE) and rockfalls (RF)įigure 22. ![]() SO 2 emission rates, measured by FLYSPEC, are for the day before the reporting date. No ash explosions were recorded during this time period. Rockfall events are related to the detachment of lava fragments at the volcano's upper slopes. For example RF: 1 means 1 rockfall and VE: 2 means 2 volcanic earthquakes. Number of events represent counts from the seismic monitoring network over a 24-hour period prior to the stated reporting date/time (except as noted). Almost daily summaries of observations at Mayon, including seismicity and SO 2emission rates during 1 June -23 November 2013. Rockfalls and earthquakes are plotted in figure 22. The activity reported by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) in table 12 below represents a continuation of table 11 from a previous Bulletin report ( BGVN 34:12). These earthquakes occur about once every other day, with minimal earthquakes in June and September. Seismicity has mostly receded to baseline levels, aside from occasional volcanic earthquakes. 2462 m All times are local (unless otherwise noted)įollowing the phreatic eruption on that killed 7 climbers ( BGVN 38:04), there has been little increase in volcanic activity at Mayon volcano. ![]()
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